werkzeug.wsgi._RangeWrapper

This class can be used to convert an iterable object into an iterable that will only yield a piece of the underlying content. It yields blocks until the underlying stream range is fully read. The yielded blocks will have a size that can't exceed the original iterator defined block size, but that can be smaller. If you're using this object together with a :class:`Response` you have to use the `direct_passthrough` mode. :param iterable: an iterable object with a :meth:`__next__` method. :param start_byte: byte from which read will start. :param byte_range: how many bytes to read.